Why the Order You Pay Off Debt Changes Everything
If you have three credit cards, a car loan, and a personal loan, the order in which you attack them matters more than how much extra you can throw at debt each month. The debt avalanche method says: list every debt by interest rate, highest to lowest, pay the minimum on everything except the highest-rate debt, and throw every spare dollar at that one first. Once it’s gone, roll that payment into the next-highest rate. Mathematically, this is the cheapest way out of debt, full stop.
The Math Behind It
Interest compounds on whatever balance is outstanding, so a 24% credit card bleeds you faster than a 7% car loan even if the car loan balance is larger. Say you owe $4,000 at 24% APR and $9,000 at 7% APR. Every month you carry the credit card balance, you’re paying roughly $80 in interest alone before a single dollar touches principal. Redirect extra payments there first and you stop that bleeding fastest, which means more of every future dollar goes toward actually shrinking what you owe rather than servicing interest.
Avalanche vs. Snowball: Picking Your Method
The debt snowball method, popularized by financial personalities, has you pay off the smallest balance first regardless of interest rate, for a psychological win. It works for some people because visible progress keeps motivation high. But run the numbers on a typical case — say $20,000 spread across four debts with rates from 6% to 26% — and the avalanche method usually saves several hundred to over a thousand dollars in total interest and shaves months off the payoff timeline. If you’re disciplined enough to stick with a plan without quick wins, avalanche is strictly cheaper.
A Hybrid That Works for Most People
If you’ve tried avalanche before and lost steam, consider a hybrid: knock out any debt under $500 immediately for a quick psychological boost, then switch to strict avalanche ordering for everything else. This captures some of the snowball method’s motivational benefit without sacrificing much interest savings, since small balances rarely carry your highest rates anyway.
Getting Started This Week
List every debt with its balance, minimum payment, and interest rate in a simple spreadsheet. Sort by rate. Call your highest-rate creditor and ask if they’ll lower it — a five-minute phone call sometimes shaves several points off, especially if you have a decent payment history. Then automate minimum payments on everything else and set up one extra autopay toward the top of your list. The method only works if the extra payment actually goes to the right debt every single month, so automating it removes the chance you’ll forget or get tempted to spread it around.
